Vacuum filter flask



FIG. 1 is a top view of the disclosed vacuum filter flask;

FIG. 2 is a front view of the disclosed vacuum filter flask;

FIG. 3 is a side view of the disclosed vacuum filter flask;

FIG. 4 is an opposite side view of the disclosed vacuum filter flask, the back of the disclosed vacuum filter flask is a mirror image of FIG. 2;

FIG. 5 is a bottom view of the disclosed vacuum filter flask;

FIG. 6 is a broken away cross-sectional view of the lower portion of the disclosed vacuum filter flask;

FIG. 7 is a top view of the disclosed vacuum filter flask having the cover and filter element removed; and,

FIG. 8 is a broken away cross-sectional view of the middle portion of the disclosed vacuum filter flask. 

The ornamental design for a vacuum filter flask, as shown and described. 